Method for synchronizing cryptographic teleprinter equipment



METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 2 I nuenlorS KAR' R. MEISINGSET VAR NO Atto rney Get. 24, 1967 K. R. MEISINGSET ET AL 3,349,175

METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 5 Inventors KARE R. ME/S/NGSET IVAR MO Horn? y Oct. 24, 1967 K. R. MEIS'INGSET ET AL 3,349,175

METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-5heet 7 Inventors KARE k. ME/SM/GSET IVAR MO A I W/ 240M154 K- R. MEISINGSET ET AL 3,349,175

Oct. 24, 1967 METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT 26 Sheets-Sheet 8 Filed Jan.

Oct. 24, 1967 K- R. MEISINGSET ET AL METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPHINTER EQUIPMENT Filed Jan. 6. 1964 26 Sheets-Sheet 9 S IL asa a x Qz 5% i? 5,

Attorney Oct. 24, 1967 ME|S|NGSET ET AL 3,349,175

' METHOD FOR SYN-CHRONIZING CRYPTOG RAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6. 1964 26 Sheets-Sheet l0 MAN. 5 A H he c5 //2/// lnvenlors KARE R. ME/S/NGSE [VAR Mo Oct. 24, 1967 K- R. MEISINGSET ET AL 3,349,175

METHOD FOR SYNGHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 0, FF/O a, FF/l 26 Sheets-$heet 12 Ilium/ g film WLJJ L I lnvenlors KARE R. Mf/S/NGSET VAR MO Oct. 24, 1967 ME|s|NGsET ET AL 3,349,175

METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 15 QEWESQ Oct. 24, 1967 K. R. MEISINGSET ET AL 3,349,175

METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 14 Oct. 24, 1967 K. R. MEISINGSET ET AL 3,349,175

METHOD FOR SYNGHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 16 wpm p ow

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METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet l7 &

I 054 I I Inventors KARE R- MG/S/NGSET ll/AR No Oct. 24, 1967 ME|s|NGsET ET AL 3,349,175

METHOD FOR SYNCHR'ONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet l8 l M's 2/ L2 L4 InvenlorS KARE R.ME/.5//VG$T IVAR MO Oct. 24, 1967 K. R. MEISINGSET ET AL 3,349,175

METHOD FOR SYNGHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT Filed Jan. 6, 1964 26 Sheets-Sheet 19 l n 0e n I 0 r5 R4 R6 R. ME/Sl/VGSE? /VAR Mo 

1. METHOD FOR SYNCHRONIZING CRYPTOGRAPHIC TELEPRINTER EQUIPMENT COMPRISING THE ENCIPHERING OF A PLAIN TEXT AT THE TRANSMITTING END BY PROCESSING IT WITH A KEY MATERIAL ACCORDING TO SOME PREDETERMINED RULE, AND RECOVERING THE PLAIN TEXT AT THE RECEIVING END BY PROCESSING THE ENCIPHERED TEXT WITH A DUPLICATE OF THE SAID KEY MATERIAL, CHARACTERIZED IN THIS THAT THE START PULSE TIME POSITIONS AND/OR STOP PULSE TIME POSITIONS OF THE ENCIPHERED TELEPRINTER CHARACTERS ARE USE FOR TRANSMITTING INFORMATION IN FORM OF A SERIAL NUMBER INDICATING THE SETTING OF SAID KEY MATERIAL IN RELATION TO A PREDETERMINED STARTING TIME POSITION. 